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    • 2. 发明授权
    • Apparatus for controlling decision threshold voltage to optical receiver
    • 用于控制光接收机的判定阈值电压的装置
    • US07313333B2
    • 2007-12-25
    • US10815064
    • 2004-03-31
    • Jyung Chan LeeSeung Il MyongJoon Ki LeeKwang Joon Kim
    • Jyung Chan LeeSeung Il MyongJoon Ki LeeKwang Joon Kim
    • H04B10/06
    • H04B10/695
    • Disclosed herein is an apparatus for controlling a decision threshold voltage to an optical receiver, which is capable of automatically controlling the decision threshold voltage to the optical receiver appropriately to signal level decision on the basis of a low-frequency band signal component of an output signal from the optical receiver. The apparatus is adapted to control the level of the decision threshold voltage to the optical receiver, which converts an input optical signal into an electrical signal. To this end, the apparatus comprises a voltage detector for branching off part of the output signal from the optical receiver and detecting a corresponding voltage, a differential comparator for comparing the voltage detected by the voltage detector with a reference voltage inputted thereto and outputting the resulting differential voltage, a low pass filter for filtering the differential voltage from the differential comparator at a predetermined low frequency band and supplying the resulting voltage as the threshold voltage to the optical receiver, and a voltage controller for controlling the reference voltage to the differential comparator on the basis of a differential voltage between the threshold voltage from the low pass filter and a predetermined voltage corresponding to a predetermined minimum bit error rate.
    • 本文公开了一种用于控制光接收机的判定阈值电压的装置,其能够基于输出信号的低频带信号分量自动控制对光接收器的判定阈值电压以适当地进行信号电平判定 从光接收机。 该装置适于控制光接收器的判定阈值电平的电平,光接收器将输入光信号转换为电信号。 为此,该装置包括用于将来自光接收器的输出信号的一部分分支并检测相应电压的电压检测器,用于将由电压检测器检测到的电压与输入到其的参考电压进行比较的差分比较器, 差分电压,低通滤波器,用于在预定的低频带对差分比较器的差分电压进行滤波,并将得到的电压作为阈值电压提供给光接收器;以及电压控制器,用于控制差分比较器的参考电压 来自低通滤波器的阈值电压与对应于预定最小误码率的预定电压之间的差分电压的基础。
    • 7. 发明申请
    • FREIGHT CONTAINER CARGO-WORKING MANAGEMENT SYSTEM AND METHOD USING RFID TECHNOLOGY
    • 使用RFID技术的货运集装箱货物管理系统和方法
    • US20100253483A1
    • 2010-10-07
    • US12676771
    • 2008-05-23
    • Hoe-Sung YangDong-Beom ShinSeung Il MyongHeyung Sub LeeGil Young ChoiCheol Sig Pyo
    • Hoe-Sung YangDong-Beom ShinSeung Il MyongHeyung Sub LeeGil Young ChoiCheol Sig Pyo
    • H04Q5/22
    • G06Q10/08
    • A freight container cargo-working management system and method which can use Radio Frequency Identification (RFID) technology for displaying a cargo-working location of a container by recognizing an RFID tag adhered to a container vehicle passing through a warehouse entrance is provided. A freight container cargo-working management system including: an RFID tag to include freight information and be adhered to a container; an RFID reader to be installed at a warehouse entrance for recognizing the freight information included in the RFID tag; a cargo-working location information transmitter to be installed at the warehouse entrance for wirelessly transmitting cargo-working location information of the container corresponding to the freight information recognized by the RFID reader; and a cargo-working location display to be included in a vehicle with the container attached for displaying the cargo-working location information wirelessly transmitted from the cargo-working location information transmitter.
    • 提供了一种货物集装箱货物管理系统和方法,其可以使用射频识别(RFID)技术来识别附着在通过仓库入口的集装箱车辆上的RFID标签来显示集装箱的货物工作位置。 货物集装箱货运管理系统,包括:RFID标签,包括货运信息,并附在容器上; 将要安装在仓库入口处的用于识别RFID标签中包含的货运信息的RFID读取器; 在仓库入口处安装货物处理位置信息发送器,用于无线地传送与由RFID读取器识别的货运信息对应的容器的货物工作位置信息; 以及包含在车辆中的货物工作位置显示器,其中附接有用于显示从货物工作位置信息发送器无线发送的货物工作位置信息的容器。
    • 10. 发明授权
    • Tunable high-order bessel low pass filter
    • 可调式高阶贝塞尔低通滤波器
    • US07049902B2
    • 2006-05-23
    • US10858925
    • 2004-06-01
    • Seung Il MyongKwang Joon KimJyung Chan LeeSang Kyu Lim
    • Seung Il MyongKwang Joon KimJyung Chan LeeSang Kyu Lim
    • H03H7/01H03J3/00H03J7/02
    • H03H7/12
    • A tunable high-order Bessel low pass filter which is applied to a multi-rate duobinary generation system of an optical communication system. The tunable Bessel low pass filter comprises a variable inductor circuit including a plurality of variable inductors connected in series between an input signal terminal and an output signal terminal and controlled respectively by corresponding inductance control signals, a variable capacitor circuit including a plurality of variable capacitors connected respectively between corresponding connection nodes of the plurality of variable inductors of the variable inductor circuit and a ground terminal and controlled respectively by corresponding capacitance control signals, and a variable capacitor/inductor controller for outputting the corresponding capacitance control signals to the variable capacitors of the variable capacitor circuit and the corresponding inductance control signals to the variable inductors of the variable inductor circuit on the basis of preset values according to a given data rate, respectively. When the data rate of an application system is changed, the tunable Bessel low pass filter controls its filtering characteristics most appropriately to the changed data rate, so as to extend its application range and enhance performance and efficiency of the application system.
    • 一种可调谐的高阶贝塞尔低通滤波器,适用于光通信系统的多速率二进制生成系统。 可调谐贝塞尔低通滤波器包括可变电感器电路,其包括串联连接在输入信号端子和输出信号端子之间的多个可变电感器,分别由相应的电感控制信号控制,可变电容器电路包括多个连接的可变电容器 分别在可变电感器电路的多个可变电感器的相应连接节点和接地端子之间分别由相应的电容控制信号控制;以及可变电容器/电感器控制器,用于将相应的电容控制信号输出到变量的可变电容器 电容器电路和相应的电感控制信号分别根据给定的数据速率在可变电感器的可变电感器的基础上进行预设值。 当应用系统的数据速率发生变化时,可调式贝塞尔低通滤波器最适合改变数据速率控制其滤波特性,从而扩展其应用范围,提高应用系统的性能和效率。